.List-box{
    margin-top: 10px;
}
.item-box{
    position: relative;
    margin-bottom: 10px;
    height: 50px;
    line-height: 50px;
}
.item-box:hover{
    background: #ccc;
}
.item-box:hover .del-btn{
    display: inline-block;
}
.del-btn{
    display: none;
    position: absolute;
    right: 50px;
    top: 10px;
    height: 30px;
    line-height: 30px;
    background: red;
    color: #fff;
}
.choose{
    margin-right: 10px;
}
